Ernest b



E. B. BREWSTER.

AIR BRUSH.

APPLICATION FILED MAR- 17, H9. 1,316,937. Patented Sept. 23, 1919.

lad/765545 I UNITED STATES PATENT OFFICE.

ERNEST B. BREWSTER, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF T0 CHARLESW.

I WILLIAMS & COMPANY, OF NEW YORK, N. Y.

AIR-BRUSH.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application filed March 17, 1919. Serial No. 283,060.

To all whom it may concern:

Be it known that I, ERNEST B. BREWSTER, a citizen of the United States,residing at New York city, in the county of New York and State of NewYork, have invented certain new. and useful Improvements in Air-Brushes, of which the following is a specification.

. This invention has relation to air brushes and means for supportingthe same, and has for its primary obJect to provide an air I brush of animproved construction whereby a spray of color medium may be obtained bywhich a uniform color may be imparted to any surface without spatteringor causing the color to collect in spots.

I Another object of the invention is to provide an air brush inwhich thecolor is fed thereto by gravity and controlled by a needle Valve and inwhich the air flows from the brush in advance of the color, therebyproducing a' vacuum to assist flow of the color and also insuring themixture of air and color only outside of the brush.

Another object of the invention is to provide an air brush of a moresimple construction than similar devices heretofore provided, permittingthe facile cleaning thereof and having an extremely simple adjustingmeans for the air and color.

Another object of the invention is to provide a support for the airbrush of my invention whereby the air brush may be moved back and forthacross a surface to impart to the latter a uniform shade of color.

Another object of the invention is to provide a support for my improvedair brush whereby embossed paper may have imparted thereto a novel coloreflect consisting of means for supporting the brush at an acute anglerelative to the surface of the paper so as'to cause thecolor to collecton one side i of the raised portions of the embossed paper,

the support being adjustable to vary the angle and vertical height tosecure different effects.

In addition to the foregoing, this invention comprehends improvements inthe denated by the same characters of reference throughout the severalviews in which they appear,

Figure 1 is a view in front elevation of a coloring machine constructedin accordance with my invention.

Fig. 2 is a view thereof in side elevation.

Fig. 3 is a detail view in perspective of the air brush support.

Fig. 4 is a view in longitudinal section of my improved air brush.

gig. 5 is a view thereof in side elevation, an

Fig.6 is a transverse section taken on the line 6-6 of Fig. 4.

With reference to the drawings, 10 indicates atable having a pair ofupstanding standards 11 secured to the sides thereof, each standardhaving a vertical slot 12 formed therein in which to receive screws 13which secure the standard to the sides of the table. The upper ends ofthe standards support a transversely extending square rod 14, having itsends rounded to journal in the standard. Mounted upon the rod 14.- is acarriage 15 consisting of a pair of angular plates 16, one to engageeach side of the rod, the ends of the angle bars 16 being enlarged as at17 whereby bolts 18 may be entered therethrough to secure the angle barstogether. Formed upon the upper bar 16 is an extension 19 having anapertured enlargement whereby one end of a link 20 ma be connectedthereto, the other end of the link being connected to a crank arm 21which is rotated by any suitable means not shown. Depending from thelower angle bar 16 is an enlargement 22 having an aperture in which toreceivean air brush indicated generally at 23. A set screw 24 enters theenlargement to secure the air brush in place.

With particular reference to the air brush it will be seen that the sameconsists of a tubular casing 25 having both ends reduced and threaded asat 26 and 27, the latter constituting the rear end of the air brush.Located interiorly of the casing is a tubular nozzle 28 of a diameter todefine an annular space 29 thereabout and having the inner end enlargedas at 30 to snugly fit the interior of the casing. The forward end ofthe nozzle is reduced in diameter and extends beyond the end of thecasing as shown. A needle valve is provided in the form of a relativelylong thin rod 31 having its forward end pointed as at 32 to be locatedwithin the reduced end of the nozzle 28, while its opposite end isprovided with an enlargement 33 which snugly fits the bore of the easing25 so as to centralize the rod 31 at all times. A coiled spring 34 isencircled about the rod 31 and engages at one end against theenlargement 30 of the nozzle and at its opposite end against theenlargement 33, thus urging the needle valve rearwardly and toward anopen position.. A threaded cap 35 is applied to the rear reduced portion27 and the same engages the enlargement 33 of the needle valve wherebyrotation of said cap will cause the needle valve to travel forwardly andthus vary the aperture at the forward end of the nozzle. The cap thusconstitutes an adjusting element for the needle valve. Ap-

plied to the forward reduced end 26 is a second cap 36 which may also betermed a nozzle, since an opening 37 is provided in its forward end,said opening gradually enlarging rearwardly and ada ted to receive theforward end of the nozz e 28 in spaced relation thereto. It will beobvious that by rotating the cap 36 the distance between the nozzle 28andthe walls of the opening 37 may be varied. A pair of openings 39 and40'areformed in the sides of the casing 25,

one opening communicating with a space around the nozzle 28, while theother opening communicates with the interior of the casing rearwardly ofsaid nozzle 28. Any suitable connections 40 may be inserted into theopenings whereby a flexible conduit such as a piece of tubing may beapplied thereto to conduct the material to the air brush.

The essential object of the apparatus shown in Figs. 1, 2 and 3 is tocolor or tint either plain or embossed paper, and to that end the paperis laid upon the table 10 and caused to travel thereacross at a uniformrate of speed. The color to be applied is placed at] any suitableelevation and conducted by means of a tube 42 to the opening 40 in thecasing of the air brush, whereupon the color flows through the nozzle28. At

the same time air under pressure is conducted through a tube 43 into theforward opening 39 of the air brush and flows around the nozzle 28and'issues through the constricted opening 37 of thenozzle 36. The

' paper.

causing the carriage to travel from one side of the table to the otherthereby depositing the color upon the paper in a uniform manner. It willbe apparent from-Fig. 2 that the color may be directed at an acute anglerelative to the surface of the paper. This method is employed whenembossed paper is to be colored in which event the color is depositedupon one side of the raised portions of the paper thereby producing anovel effect. It will be apparent that by loosing the set screws whichsecure the rod 14 to the standard the rod and consequently the carriagemay be rotated so as to vary the angle of the air brush relative to thesurface of the In this manner different efi'ects'can e secured whenembossed paper is used.

Thus it will be seen that I have provided a novel form of apparatus forsupporting an air brush whereby paper may be tinted in a uniform mannerand whereby various effects may be produced. It will be also apparentthat I have provided an air brush of a new and novel construction whichis characterized by its extreme simplicity both in details ofconstruction and operation. It will be apparent that the air brush maybe readily cleaned since it comprises but two parts which are readilydisconnectible one from another. Other novel points of advantage will beapparent to those skilled in the art to which this invention appertains.While I have illustrated and described my invention with some degree ofparticularity, I realize that in practice various alterations thereinmay be made. I therefore reserve the right and privilege of dhanging theform of the details of construction or otherwise altering, thearrangement of the correlated parts without departing from the spirit ofthe inventionor the scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by United States Letters Patent is:

'1. In an air brush, a tubular casing having .a pair of longitudinallyspaced openings, a

relatively long nozzle mounted in spaced relation interiorly to thecasing, an enlargement on the rear end of the nozzle disposed betweenthe openings to define forward and rear chambers, a needle valve rodextending through the casing and into the nozzle, a coiled springsurrounding-the nozzle to urge the needle .in an open position, a capand screw threaded upon the rear end of the casing and engaging theneedle rod to urge the same forward against the tension of the spring,and a cap screw threadedly engaged upon the forward end of the casingand havin an aperture to partly receive the nozzle sai cap being incommunication with the forward chamber to receive the air.

2. A paper coloring machine includin a table, a pair of supports one ateach slde thereof, adjusted for vertical movement, a rod mounted in saidsupport for rotation means for securing the rod in .an adjustedposition, a carriage mounted to slide upon the rod, means for moving thecarriage back a and forth, and an air brush mounted upon the carriage.

3. A paper coloring machine including a table, a rod mounted above thetable to extend transversely thereof, a carriage in the form of a pairof meeting members to embrace therod, means for securing the memberstogether, a link pivotally connected at one end to the carriage, a crankarm pivotall connected to the opposite end of the lin an apertureextension depending from the lower embracing member, an air brushextendlng through said aperture, and means for securing the air brushtherein.

In testimony whereof I afiix my signa- 25 ture in presence of twowitnesses.

ERNEST B. BREWSTER Witnesses:

Onannns W. WILLIAMS. JAB. F. CAVAGNARO.

